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A 2025 customer said that after their furnace started tripping the rollout switch on a Friday night, Charlie made a trip over Saturday evening, gave them options and a clear explanation, and first thing Monday morning they swapped the unit out and left zero mess. A 2025 customer said Charlie was responsive when their system failed and needed to be replaced in frigid weather. A 2026 customer said Charlie and Joey came out within 48 hours at most and answered their questions clearly. A 2025 customer said Charley spec'd a project, gave a quote quickly and had the work scheduled within 10 days, and that the guys onsite moved vents and made the return air duct quieter. A 2023 customer who had no heat during a cold snap said they asked Charlie for a new furnace asap and he made sure it was done. A 2023 customer said they replaced a freon-based AC/heating unit. A 2022 customer said they diagnosed and fixed the A/C. A 2025 customer said Charlie Marshall and his team installed a high-efficiency HVAC system in an uninsulated attic more than five years earlier, for a builder's cul-de-sac community in southern New Hampshire, and that calls to his personal cell phone about it over the years got no call back. Charles L Marshall's New Hampshire HVAC licence, GFE0905951, is active on the state registry.
As new homeowners, we have had a lot to learn and Charlie and Joey have been incredibly helpful. They’ve addressed our issues thoroughly and carefully and have answered questions clearly. We’ve also been impressed with how quickly they’ve come out (48 hours at most). Highly recommend!
Charlie was extremely responsive with our family when our system failed and needed to be replaced with incredible urgency in frigid weather. He was both professional and kind. Highly recommend!
Charlie and his team really came through for me and my family, Friday night sometime our furnace started tripping the rollout switch after many phone calls I was given the number for Marshall Mechanical , Charlie made a trip over Saturday evening to confirm our fear that it was time for a new furnace. We were given options and a clear explanation of what we’d be getting and then first thing Monday morning they swapped our unit out . Very friendly and professional and left zero mess . I hope to only need their services for routine maintenance now. Thanks guys Merry Christmas
Charlie Marshall and his team were responsible for the installation of many HVAC systems 5+ years ago for a builder that owned the rights to a cul-de-sac community in southern New Hampshire. I happen to be one of those homes. Charlie and his team installed a high efficiency HVAC system in an uninsulated attic which should never have passed inspection being that those systems require double ventilation or an insulated attic. I have been unable to find a reputable company to service this unit in all those years because of parts that were used that have been recalled or the fact that the system does not meet compliance. I have called Charlie Marshall on his personal cell phone many times over the years and have not received a phone call to discuss this matter. Therefore, I find this review to be extremely appropriate to give buyers a buyer. Beware of what you are purchasing and installing in your home since this individual doesn’t seem to install things to code. This might be a one off, but Charlie had every opportunity to fix the issue and he did not.
Charley came out promptly when we asked, spec'd the project, gave us a quote quickly and the work was scheduled within 10 days. Guys onsite for the project did a great job, moved vents just as needed and actually made the return air duct vastly quieter. Excellent work all around. Many thanks.
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1 change recorded — last scanned Oct 18, 2026.
Typical your area range for this kind of work, from regional averages — not a quote from Marshall Mechanical, LLC.. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$5,000 – $11,400
Typical HVAC project around $8,200
Heat pump install with clear, fair pricing3.8
Water heater installed the same day4.0